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https://ollama.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
96
GRADE
A
FIX
1
REVIEW
2
PASS
10
INFO
1

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
100
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
69
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

450 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

490 ms

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

450 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

490 ms

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
14
10 PASS 2 REVIEW 1 FIX
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Image Optimization
2 images, 0 KB saveable
REVIEW
2 images, 0 KB saveable
Warning::
https://ollama.com/public/ollama.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ollama.com/public/openclaw_ollama.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
2 images 82 KB
0 oversized -0 KB
2 legacy format
2 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
JS Bundles
1 scripts, 68 KB unused
REVIEW
1 scripts, 68 KB unused
Warning::
https://ollama.com/public/vendor/htmx/bundle.js: 68 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ollama.com/public/vendor/htmx/bundle.js: unminified — 39 KB could be saved
Info::
Total unused JavaScript: 68 KB
68 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://ollama.com/public/vendor/htmx/bundle.js88 KB68 KB (77%)✗1st

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

A+
Page Weight Budget
265 KB transferred, 7 requests
PASS
265 KB transferred, 7 requests
Info::
Page weighs 263 KB (265 KB transferred)
Info::
7 HTTP requests
Info::
Estimated 0.05 g CO2 per page load
265 KB / 2.4 MB budget
265 KB transferred
7 requests
0.05 g CO2 per page load
JavaScript 87.9 KiB 33%
Images 82.0 KiB 31%
CSS 69.6 KiB 26%
HTML 24.1 KiB 9%
Other 915 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-party.
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
JS Execution Cost
No JS execution data
PASS
No JS execution data
Info::
No significant JS execution detected

Main Thread Breakdown

Other 42% Style & Layout 31% Script Evaluation 14% Parse HTML & CSS 6% Script Parsing & Compilation 4%
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Page Weight Inventory
7 resources · 265 KB · 68 KB savings available
PASS
7 resources · 265 KB · 68 KB savings available
Info::
Within 1MB page-weight target
Got: 265 KB
Info::
~68 KB of savings available
7 resources · 264.5 KiB · 0 third-party Within 1MB page-weight target
JavaScript 33% · 87.9 KiB
Image 31% · 82.9 KiB
CSS 26% · 69.6 KiB
Document 9% · 24.1 KiB

~67.6 KiB of savings available

Remove unused JavaScript: 67.6 KiB
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Google Cloud

Network Waterfall
7 requests over 362ms
INFO
0 ms 200 ms 400 ms FCP 450 ms LCP 490 mshttps://ollama.com// https://ollama.com/ — 200 — 24.1 KiB — 172 ms — h2https://ollama.com/public/tailwind.css?v=32a4ef0e94b2fe641d555eb144b24aae/public/tailwind.css?v=32a4ef0e94b2... https://ollama.com/public/tailwind.css?v=32a4ef0e94b2fe641d555eb144b24aae — 200 — 67.6 KiB — 129 ms — h2https://ollama.com/public/vendor/prism/prism.css?v=32a4ef0e94b2fe641d555eb144b24aae/public/vendor/prism/prism.css?v=32... https://ollama.com/public/vendor/prism/prism.css?v=32a4ef0e94b2fe641d555eb144b24aae — 200 — 2.0 KiB — 122 ms — h2https://ollama.com/public/vendor/htmx/bundle.js/public/vendor/htmx/bundle.js https://ollama.com/public/vendor/htmx/bundle.js — 200 — 87.9 KiB — 51 ms — h2https://ollama.com/public/ollama.png/public/ollama.png https://ollama.com/public/ollama.png — 200 — 7.6 KiB — 51 ms — h2https://ollama.com/public/openclaw_ollama.png/public/openclaw_ollama.png https://ollama.com/public/openclaw_ollama.png — 200 — 74.4 KiB — 62 ms — h2https://ollama.com/public/icon-32x32.png/public/icon-32x32.png https://ollama.com/public/icon-32x32.png — 200 — 915 B — 23 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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